Pneumatic tire.



PATENTED NOV. 19, 1907.

F. C. HOOD. P NEUMATIG TIRE.

APPLICATION FILED mm: 11. 190g.

stress as inrounding curves is avoided,

STATES PATENT orries;

FREDERI CLARKE noon, or BOSTON, Massaonnsnrrs.

PNEUMATIC TIRE.

matic Tires, of which thefollowing is a spec fication.- v I My "invention relates to improvements in pneumatic tires, and more especially to detachable or mechanically fastened tires for motor vehicles.

In devising my said invention I have aimed to'provide a construction which will permit of the outer case being easily and quickly applied and removed while all damger of accidental displacement under great,

anr all possibility of the tire coming off in case of accidental deflation is prevented.

I have also aimed to so shape or construct the parts that it will be practically impossi ble to apply the tire to the wheel with the inner tube pinched as so frequently happens with ordinary forms of double tube tires.

A still further object is to provide a construction in which rim cutting is avdided and all danger of creeping removed.

With these and possibly other objects in view, the invention mclude's the special fea' tures of construction and arrangement and combination of parts hereinafter described and particularly set forth in the appended claims.

It is illustrated in the accompanying drawin in which,-

igure 1 is a side elevation of a portion of a wheel rim with the tire applied thereto. Fig. 2 is a transverse section on line 2-2 of Fig. 1 and, Fig. 3 is a similar section on line 3-3 of Fig. 1. 0

Referring by reference characters to this drawing, the numeral 1' designates the wooden felly of a vehicle wheel of the ordinary or any desiredconstruction, and 2 a metal rim secured to the felly in any convenient and well known mariner. This rim may advantageously be made of pressed steel, and it has one edge (the inner) vided with an integral flan e 3 whic 1s rounded or curved outwardly as shown. The rim upon the other side is provided with 'a removable flange 4 of similar shape which abuts against the edge 2" of the rim and is held in lace by bolts 5 which pass through aliningholes in the removable and integral Specification of Letters Patent. Application filed June 11. 1905- Serial No. 321.229.

. cry of the Patented Nov. 1 9 1907.

flanges. The holes in the flanges are so located, as'will be readily seen from'the drawing, that the bolts rest against the outer face of the rim, this arrangement having a twofold function, one being to provide means for preventing the tire from creeping upon the rim in the manner hereinafter described, and the other being that this arrangement renders it necessary to only" through the flanges 3 and 4, and the forming of holes or channels in the body of the rim itself is unnecessary, thereby reducing the amount of Work and cheapening the construc tion.

The outer case is shown at 6 and. the inner tube at 7, this latter being provided with the usual valve tube or stem 8. The outer case is provided with thickened edges 7 in which I preferably locate a plurality of endless wires 9 which are molded and vulcanized in the rubber and serve to prevent stretching. The outer case is formed so that its inner circumference corresponds to the outer periphrim 2 and the edges 7 u are so shaped in cross section that when they are in place upon the rim and. confined by the side flanges 3 and 4 a complete cylindrical channel is formed within the outer ease for the reception of the inner tube and no channels or recesses are left into which the inner tube may be expanded or pinched by the air pressure within the same.

The edges 7 of the outer case are formed in molding with transverse grooves or channels in the under-face corresponding in size and position to the bolts 5, and the engagement of the bolts with these grooves serves to prevent any creeping of the tire upon the run.

I find it desirable to provide lugs or projections 10 and 10 on the rim on opposite sides at the points Where the bolt holes are located, the projections 10 being integral with the flange 3 andserving to brace it while the projections 10 serve as an abutment against which the removable flange" 4 is clamped by the bolts. These lugs or projections also strengthen the rim by providing a greater amount of metal at the points where the bolts pass through. The corners of the outer case are provided with recesses to correspond with these lugs and the increased engaging surface serves as a further prevent- 1ve against creeping.

l When the tire thus constructed is to be reily removed and replaced, and one in which I the inner tube may be properly placed in pomoved from the rim the removable flange 4 isdetac'hed when the portion of the outer case on the side of the wheel opposite the rim may be slipped ofl' laterally, the tire of course having fi'r'stfbeen deflated. This will permit the valve stem to be drawn out of the opening in the rim and felly, when of course the inner tube may be readily moved from the outer case or the whole tire removed. In replacing the tire upon the wheel, it will be readilyun'derstoodt'hat the reverse operation will take place.

From the foregoing construction, it will be obvious that I provide a tire which willbe firmly held upon the rim, and which cannot creep thereon, and one in which liability of rim cutting is reduced to a minimum. I also provide a tire which may be quickly and eas sition Within the outer case before any part of the outer case is placed upon the rim,

which is -a very important feature.

Having thus described my invention, what I claim is In combination, a rim having a substantially flat surface and a permanent retaining flange on one side, a removable flange on the opposite side, inwardly extending "projections having inclined faces-at the junctions of the flanges and rim, said projections serving to brace saidflanges, bolts passing across the face of the rim and through said projections and connecting the permanent and removable flanges, and a resilient tire seated on said rim and confined between said flanges, said tire having transverse grooves to receive the bolts and corner recesses to receive the lugs, substantially as described.

In testimony whereof I afflx my signature in presence of two witnesses.

FREDERIO CLARKE Hoop.

Witnesses:

M. CUTTING, EVA LEAVITT. 

